Tracking down Ripper suspect

I am researching the Irishman, Francis Tumblety, born near Dublin circa 1830, who in later life became one of the chief suspects in the Jack the Ripper case in Whitechapel 1888.

I know that he and members of his family left Ireland on a famine ship in 1847 and that Tumblety lived most of his life in the US after that. He was known as a Fenian sympathiser and later a Parnellite and is said to have visited Ireland in both 1869 and 1883.

I already know a lot about his life in the US but I’m looking for information about his life in Ireland prior to his departure in 1847. In all of the books written about Tumblety, not one has any details of where he lived here, where he went to school, and no trace has been found of his birth certificate. His parents’ names were Margaret and James and he was the youngest of eleven children.